In a small dish, combine ground cumin, ground chili, and salt.
Trim any excess fat from the chicken pieces and pat them dry with a paper towel. Season the chicken pieces with the spices on both sides.
Cook:
Heat a large skillet over medium-high heat. Once hot, heat up the oil. Place the chicken thighs, skin-side-down, in the skillet and sear them for 6 minutes on the first side without moving them from their spot. Flip the chicken thighs over and sear the bottom side for 3 minutes.
Reduce the heat to medium-low and place a lid over most of the skillet, leaving a 2-inch gap on one side, big enough to let the steam out. Cook the chicken thighs 20 to 25 minutes until the chicken's internal temperature reaches 175F.